package com.demo.juc.blockingqueue;

import java.util.concurrent.BlockingQueue;
import java.util.concurrent.SynchronousQueue;
import java.util.concurrent.TimeUnit;

/**
 * 同步队列
 * 和其他的BlockingQueue不一样，SynchronousQueue 不存储元素
 * put了一个元素，必须先take取出来，否则不能取出值
 */
public class SynchronousQueueDemo {


    public static void main(String[] args) {
        BlockingQueue<String> blockingDeque = new SynchronousQueue<>();//同步队列
        new Thread(() -> {
            try {
                System.out.println(Thread.currentThread().getName() + "PUT 1");
                blockingDeque.put("1");
                System.out.println(Thread.currentThread().getName() + "PUT 2");
                blockingDeque.put("2");
                System.out.println(Thread.currentThread().getName() + "PUT 3");
                blockingDeque.put("3");
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }, "T1").start();

        new Thread(() -> {
            try {
                TimeUnit.SECONDS.sleep(3);
                System.out.println(Thread.currentThread().getName() + "=>" + blockingDeque.take());
                TimeUnit.SECONDS.sleep(3);
                System.out.println(Thread.currentThread().getName() + "=>" + blockingDeque.take());
                TimeUnit.SECONDS.sleep(3);
                System.out.println(Thread.currentThread().getName() + "=>" + blockingDeque.take());

            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }, "T2").start();
    }

}
